1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2015-2016 HGST, a Western Digital Company. 4 */ 5 6 #ifndef _NVMET_H 7 #define _NVMET_H 8 9 #include <linux/dma-mapping.h> 10 #include <linux/types.h> 11 #include <linux/device.h> 12 #include <linux/kref.h> 13 #include <linux/percpu-refcount.h> 14 #include <linux/list.h> 15 #include <linux/mutex.h> 16 #include <linux/uuid.h> 17 #include <linux/nvme.h> 18 #include <linux/configfs.h> 19 #include <linux/rcupdate.h> 20 #include <linux/blkdev.h> 21 #include <linux/radix-tree.h> 22 #include <linux/t10-pi.h> 23 24 #define NVMET_DEFAULT_VS NVME_VS(1, 3, 0) 25 26 #define NVMET_ASYNC_EVENTS 4 27 #define NVMET_ERROR_LOG_SLOTS 128 28 #define NVMET_NO_ERROR_LOC ((u16)-1) 29 #define NVMET_DEFAULT_CTRL_MODEL "Linux" 30 #define NVMET_MN_MAX_SIZE 40 31 #define NVMET_SN_MAX_SIZE 20 32 #define NVMET_FR_MAX_SIZE 8 33 34 /* 35 * Supported optional AENs: 36 */ 37 #define NVMET_AEN_CFG_OPTIONAL \ 38 (NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_ANA_CHANGE) 39 #define NVMET_DISC_AEN_CFG_OPTIONAL \ 40 (NVME_AEN_CFG_DISC_CHANGE) 41 42 /* 43 * Plus mandatory SMART AENs (we'll never send them, but allow enabling them): 44 */ 45 #define NVMET_AEN_CFG_ALL \ 46 (NVME_SMART_CRIT_SPARE | NVME_SMART_CRIT_TEMPERATURE | \ 47 NVME_SMART_CRIT_RELIABILITY | NVME_SMART_CRIT_MEDIA | \ 48 NVME_SMART_CRIT_VOLATILE_MEMORY | NVMET_AEN_CFG_OPTIONAL) 49 50 /* Helper Macros when NVMe error is NVME_SC_CONNECT_INVALID_PARAM 51 * The 16 bit shift is to set IATTR bit to 1, which means offending 52 * offset starts in the data section of connect() 53 */ 54 #define IPO_IATTR_CONNECT_DATA(x) \ 55 (cpu_to_le32((1 << 16) | (offsetof(struct nvmf_connect_data, x)))) 56 #define IPO_IATTR_CONNECT_SQE(x) \ 57 (cpu_to_le32(offsetof(struct nvmf_connect_command, x))) 58 59 struct nvmet_ns { 60 struct percpu_ref ref; 61 struct bdev_handle *bdev_handle; 62 struct block_device *bdev; 63 struct file *file; 64 bool readonly; 65 u32 nsid; 66 u32 blksize_shift; 67 loff_t size; 68 u8 nguid[16]; 69 uuid_t uuid; 70 u32 anagrpid; 71 72 bool buffered_io; 73 bool enabled; 74 struct nvmet_subsys *subsys; 75 const char *device_path; 76 77 struct config_group device_group; 78 struct config_group group; 79 80 struct completion disable_done; 81 mempool_t *bvec_pool; 82 83 struct pci_dev *p2p_dev; 84 int use_p2pmem; 85 int pi_type; 86 int metadata_size; 87 u8 csi; 88 }; 89 90 static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item) 91 { 92 return container_of(to_config_group(item), struct nvmet_ns, group); 93 } 94 95 static inline struct device *nvmet_ns_dev(struct nvmet_ns *ns) 96 { 97 return ns->bdev ? disk_to_dev(ns->bdev->bd_disk) : NULL; 98 } 99 100 struct nvmet_cq { 101 u16 qid; 102 u16 size; 103 }; 104 105 struct nvmet_sq { 106 struct nvmet_ctrl *ctrl; 107 struct percpu_ref ref; 108 u16 qid; 109 u16 size; 110 u32 sqhd; 111 bool sqhd_disabled; 112 #ifdef CONFIG_NVME_TARGET_AUTH 113 bool authenticated; 114 struct delayed_work auth_expired_work; 115 u16 dhchap_tid; 116 u16 dhchap_status; 117 int dhchap_step; 118 u8 *dhchap_c1; 119 u8 *dhchap_c2; 120 u32 dhchap_s1; 121 u32 dhchap_s2; 122 u8 *dhchap_skey; 123 int dhchap_skey_len; 124 #endif 125 struct completion free_done; 126 struct completion confirm_done; 127 }; 128 129 struct nvmet_ana_group { 130 struct config_group group; 131 struct nvmet_port *port; 132 u32 grpid; 133 }; 134 135 static inline struct nvmet_ana_group *to_ana_group(struct config_item *item) 136 { 137 return container_of(to_config_group(item), struct nvmet_ana_group, 138 group); 139 } 140 141 /** 142 * struct nvmet_port - Common structure to keep port 143 * information for the target. 144 * @entry: Entry into referrals or transport list. 145 * @disc_addr: Address information is stored in a format defined 146 * for a discovery log page entry. 147 * @group: ConfigFS group for this element's folder. 148 * @priv: Private data for the transport. 149 */ 150 struct nvmet_port { 151 struct list_head entry; 152 struct nvmf_disc_rsp_page_entry disc_addr; 153 struct config_group group; 154 struct config_group subsys_group; 155 struct list_head subsystems; 156 struct config_group referrals_group; 157 struct list_head referrals; 158 struct list_head global_entry; 159 struct config_group ana_groups_group; 160 struct nvmet_ana_group ana_default_group; 161 enum nvme_ana_state *ana_state; 162 void *priv; 163 bool enabled; 164 int inline_data_size; 165 const struct nvmet_fabrics_ops *tr_ops; 166 bool pi_enable; 167 }; 168 169 static inline struct nvmet_port *to_nvmet_port(struct config_item *item) 170 { 171 return container_of(to_config_group(item), struct nvmet_port, 172 group); 173 } 174 175 static inline struct nvmet_port *ana_groups_to_port( 176 struct config_item *item) 177 { 178 return container_of(to_config_group(item), struct nvmet_port, 179 ana_groups_group); 180 } 181 182 struct nvmet_ctrl { 183 struct nvmet_subsys *subsys; 184 struct nvmet_sq **sqs; 185 186 bool reset_tbkas; 187 188 struct mutex lock; 189 u64 cap; 190 u32 cc; 191 u32 csts; 192 193 uuid_t hostid; 194 u16 cntlid; 195 u32 kato; 196 197 struct nvmet_port *port; 198 199 u32 aen_enabled; 200 unsigned long aen_masked; 201 struct nvmet_req *async_event_cmds[NVMET_ASYNC_EVENTS]; 202 unsigned int nr_async_event_cmds; 203 struct list_head async_events; 204 struct work_struct async_event_work; 205 206 struct list_head subsys_entry; 207 struct kref ref; 208 struct delayed_work ka_work; 209 struct work_struct fatal_err_work; 210 211 const struct nvmet_fabrics_ops *ops; 212 213 __le32 *changed_ns_list; 214 u32 nr_changed_ns; 215 216 char subsysnqn[NVMF_NQN_FIELD_LEN]; 217 char hostnqn[NVMF_NQN_FIELD_LEN]; 218 219 struct device *p2p_client; 220 struct radix_tree_root p2p_ns_map; 221 222 spinlock_t error_lock; 223 u64 err_counter; 224 struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS]; 225 bool pi_support; 226 #ifdef CONFIG_NVME_TARGET_AUTH 227 struct nvme_dhchap_key *host_key; 228 struct nvme_dhchap_key *ctrl_key; 229 u8 shash_id; 230 struct crypto_kpp *dh_tfm; 231 u8 dh_gid; 232 u8 *dh_key; 233 size_t dh_keysize; 234 #endif 235 }; 236 237 struct nvmet_subsys { 238 enum nvme_subsys_type type; 239 240 struct mutex lock; 241 struct kref ref; 242 243 struct xarray namespaces; 244 unsigned int nr_namespaces; 245 u32 max_nsid; 246 u16 cntlid_min; 247 u16 cntlid_max; 248 249 struct list_head ctrls; 250 251 struct list_head hosts; 252 bool allow_any_host; 253 254 u16 max_qid; 255 256 u64 ver; 257 char serial[NVMET_SN_MAX_SIZE]; 258 bool subsys_discovered; 259 char *subsysnqn; 260 bool pi_support; 261 262 struct config_group group; 263 264 struct config_group namespaces_group; 265 struct config_group allowed_hosts_group; 266 267 char *model_number; 268 u32 ieee_oui; 269 char *firmware_rev; 270 271 #ifdef CONFIG_NVME_TARGET_PASSTHRU 272 struct nvme_ctrl *passthru_ctrl; 273 char *passthru_ctrl_path; 274 struct config_group passthru_group; 275 unsigned int admin_timeout; 276 unsigned int io_timeout; 277 unsigned int clear_ids; 278 #endif /* CONFIG_NVME_TARGET_PASSTHRU */ 279 280 #ifdef CONFIG_BLK_DEV_ZONED 281 u8 zasl; 282 #endif /* CONFIG_BLK_DEV_ZONED */ 283 }; 284 285 static inline struct nvmet_subsys *to_subsys(struct config_item *item) 286 { 287 return container_of(to_config_group(item), struct nvmet_subsys, group); 288 } 289 290 static inline struct nvmet_subsys *namespaces_to_subsys( 291 struct config_item *item) 292 { 293 return container_of(to_config_group(item), struct nvmet_subsys, 294 namespaces_group); 295 } 296 297 struct nvmet_host { 298 struct config_group group; 299 u8 *dhchap_secret; 300 u8 *dhchap_ctrl_secret; 301 u8 dhchap_key_hash; 302 u8 dhchap_ctrl_key_hash; 303 u8 dhchap_hash_id; 304 u8 dhchap_dhgroup_id; 305 }; 306 307 static inline struct nvmet_host *to_host(struct config_item *item) 308 { 309 return container_of(to_config_group(item), struct nvmet_host, group); 310 } 311 312 static inline char *nvmet_host_name(struct nvmet_host *host) 313 { 314 return config_item_name(&host->group.cg_item); 315 } 316 317 struct nvmet_host_link { 318 struct list_head entry; 319 struct nvmet_host *host; 320 }; 321 322 struct nvmet_subsys_link { 323 struct list_head entry; 324 struct nvmet_subsys *subsys; 325 }; 326 327 struct nvmet_req; 328 struct nvmet_fabrics_ops { 329 struct module *owner; 330 unsigned int type; 331 unsigned int msdbd; 332 unsigned int flags; 333 #define NVMF_KEYED_SGLS (1 << 0) 334 #define NVMF_METADATA_SUPPORTED (1 << 1) 335 void (*queue_response)(struct nvmet_req *req); 336 int (*add_port)(struct nvmet_port *port); 337 void (*remove_port)(struct nvmet_port *port); 338 void (*delete_ctrl)(struct nvmet_ctrl *ctrl); 339 void (*disc_traddr)(struct nvmet_req *req, 340 struct nvmet_port *port, char *traddr); 341 u16 (*install_queue)(struct nvmet_sq *nvme_sq); 342 void (*discovery_chg)(struct nvmet_port *port); 343 u8 (*get_mdts)(const struct nvmet_ctrl *ctrl); 344 u16 (*get_max_queue_size)(const struct nvmet_ctrl *ctrl); 345 }; 346 347 #define NVMET_MAX_INLINE_BIOVEC 8 348 #define NVMET_MAX_INLINE_DATA_LEN NVMET_MAX_INLINE_BIOVEC * PAGE_SIZE 349 350 struct nvmet_req { 351 struct nvme_command *cmd; 352 struct nvme_completion *cqe; 353 struct nvmet_sq *sq; 354 struct nvmet_cq *cq; 355 struct nvmet_ns *ns; 356 struct scatterlist *sg; 357 struct scatterlist *metadata_sg; 358 struct bio_vec inline_bvec[NVMET_MAX_INLINE_BIOVEC]; 359 union { 360 struct { 361 struct bio inline_bio; 362 } b; 363 struct { 364 bool mpool_alloc; 365 struct kiocb iocb; 366 struct bio_vec *bvec; 367 struct work_struct work; 368 } f; 369 struct { 370 struct bio inline_bio; 371 struct request *rq; 372 struct work_struct work; 373 bool use_workqueue; 374 } p; 375 #ifdef CONFIG_BLK_DEV_ZONED 376 struct { 377 struct bio inline_bio; 378 struct work_struct zmgmt_work; 379 } z; 380 #endif /* CONFIG_BLK_DEV_ZONED */ 381 }; 382 int sg_cnt; 383 int metadata_sg_cnt; 384 /* data length as parsed from the SGL descriptor: */ 385 size_t transfer_len; 386 size_t metadata_len; 387 388 struct nvmet_port *port; 389 390 void (*execute)(struct nvmet_req *req); 391 const struct nvmet_fabrics_ops *ops; 392 393 struct pci_dev *p2p_dev; 394 struct device *p2p_client; 395 u16 error_loc; 396 u64 error_slba; 397 }; 398 399 #define NVMET_MAX_MPOOL_BVEC 16 400 extern struct kmem_cache *nvmet_bvec_cache; 401 extern struct workqueue_struct *buffered_io_wq; 402 extern struct workqueue_struct *zbd_wq; 403 extern struct workqueue_struct *nvmet_wq; 404 405 static inline void nvmet_set_result(struct nvmet_req *req, u32 result) 406 { 407 req->cqe->result.u32 = cpu_to_le32(result); 408 } 409 410 /* 411 * NVMe command writes actually are DMA reads for us on the target side. 412 */ 413 static inline enum dma_data_direction 414 nvmet_data_dir(struct nvmet_req *req) 415 { 416 return nvme_is_write(req->cmd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 417 } 418 419 struct nvmet_async_event { 420 struct list_head entry; 421 u8 event_type; 422 u8 event_info; 423 u8 log_page; 424 }; 425 426 static inline void nvmet_clear_aen_bit(struct nvmet_req *req, u32 bn) 427 { 428 int rae = le32_to_cpu(req->cmd->common.cdw10) & 1 << 15; 429 430 if (!rae) 431 clear_bit(bn, &req->sq->ctrl->aen_masked); 432 } 433 434 static inline bool nvmet_aen_bit_disabled(struct nvmet_ctrl *ctrl, u32 bn) 435 { 436 if (!(READ_ONCE(ctrl->aen_enabled) & (1 << bn))) 437 return true; 438 return test_and_set_bit(bn, &ctrl->aen_masked); 439 } 440 441 void nvmet_get_feat_kato(struct nvmet_req *req); 442 void nvmet_get_feat_async_event(struct nvmet_req *req); 443 u16 nvmet_set_feat_kato(struct nvmet_req *req); 444 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask); 445 void nvmet_execute_async_event(struct nvmet_req *req); 446 void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl); 447 void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl); 448 449 u16 nvmet_parse_connect_cmd(struct nvmet_req *req); 450 void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id); 451 u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req); 452 u16 nvmet_file_parse_io_cmd(struct nvmet_req *req); 453 u16 nvmet_bdev_zns_parse_io_cmd(struct nvmet_req *req); 454 u16 nvmet_parse_admin_cmd(struct nvmet_req *req); 455 u16 nvmet_parse_discovery_cmd(struct nvmet_req *req); 456 u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req); 457 u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req); 458 459 bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, 460 struct nvmet_sq *sq, const struct nvmet_fabrics_ops *ops); 461 void nvmet_req_uninit(struct nvmet_req *req); 462 bool nvmet_check_transfer_len(struct nvmet_req *req, size_t len); 463 bool nvmet_check_data_len_lte(struct nvmet_req *req, size_t data_len); 464 void nvmet_req_complete(struct nvmet_req *req, u16 status); 465 int nvmet_req_alloc_sgls(struct nvmet_req *req); 466 void nvmet_req_free_sgls(struct nvmet_req *req); 467 468 void nvmet_execute_set_features(struct nvmet_req *req); 469 void nvmet_execute_get_features(struct nvmet_req *req); 470 void nvmet_execute_keep_alive(struct nvmet_req *req); 471 472 void nvmet_cq_setup(struct nvmet_ctrl *ctrl, struct nvmet_cq *cq, u16 qid, 473 u16 size); 474 void nvmet_sq_setup(struct nvmet_ctrl *ctrl, struct nvmet_sq *sq, u16 qid, 475 u16 size); 476 void nvmet_sq_destroy(struct nvmet_sq *sq); 477 int nvmet_sq_init(struct nvmet_sq *sq); 478 479 void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl); 480 481 void nvmet_update_cc(struct nvmet_ctrl *ctrl, u32 new); 482 u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn, 483 struct nvmet_req *req, u32 kato, struct nvmet_ctrl **ctrlp); 484 struct nvmet_ctrl *nvmet_ctrl_find_get(const char *subsysnqn, 485 const char *hostnqn, u16 cntlid, 486 struct nvmet_req *req); 487 void nvmet_ctrl_put(struct nvmet_ctrl *ctrl); 488 u16 nvmet_check_ctrl_status(struct nvmet_req *req); 489 490 struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn, 491 enum nvme_subsys_type type); 492 void nvmet_subsys_put(struct nvmet_subsys *subsys); 493 void nvmet_subsys_del_ctrls(struct nvmet_subsys *subsys); 494 495 u16 nvmet_req_find_ns(struct nvmet_req *req); 496 void nvmet_put_namespace(struct nvmet_ns *ns); 497 int nvmet_ns_enable(struct nvmet_ns *ns); 498 void nvmet_ns_disable(struct nvmet_ns *ns); 499 struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid); 500 void nvmet_ns_free(struct nvmet_ns *ns); 501 502 void nvmet_send_ana_event(struct nvmet_subsys *subsys, 503 struct nvmet_port *port); 504 void nvmet_port_send_ana_event(struct nvmet_port *port); 505 506 int nvmet_register_transport(const struct nvmet_fabrics_ops *ops); 507 void nvmet_unregister_transport(const struct nvmet_fabrics_ops *ops); 508 509 void nvmet_port_del_ctrls(struct nvmet_port *port, 510 struct nvmet_subsys *subsys); 511 512 int nvmet_enable_port(struct nvmet_port *port); 513 void nvmet_disable_port(struct nvmet_port *port); 514 515 void nvmet_referral_enable(struct nvmet_port *parent, struct nvmet_port *port); 516 void nvmet_referral_disable(struct nvmet_port *parent, struct nvmet_port *port); 517 518 u16 nvmet_copy_to_sgl(struct nvmet_req *req, off_t off, const void *buf, 519 size_t len); 520 u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf, 521 size_t len); 522 u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len); 523 524 u32 nvmet_get_log_page_len(struct nvme_command *cmd); 525 u64 nvmet_get_log_page_offset(struct nvme_command *cmd); 526 527 extern struct list_head *nvmet_ports; 528 void nvmet_port_disc_changed(struct nvmet_port *port, 529 struct nvmet_subsys *subsys); 530 void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys, 531 struct nvmet_host *host); 532 void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type, 533 u8 event_info, u8 log_page); 534 535 #define NVMET_QUEUE_SIZE 1024 536 #define NVMET_NR_QUEUES 128 537 #define NVMET_MAX_CMD NVMET_QUEUE_SIZE 538 539 /* 540 * Nice round number that makes a list of nsids fit into a page. 541 * Should become tunable at some point in the future. 542 */ 543 #define NVMET_MAX_NAMESPACES 1024 544 545 /* 546 * 0 is not a valid ANA group ID, so we start numbering at 1. 547 * 548 * ANA Group 1 exists without manual intervention, has namespaces assigned to it 549 * by default, and is available in an optimized state through all ports. 550 */ 551 #define NVMET_MAX_ANAGRPS 128 552 #define NVMET_DEFAULT_ANA_GRPID 1 553 554 #define NVMET_KAS 10 555 #define NVMET_DISC_KATO_MS 120000 556 557 int __init nvmet_init_configfs(void); 558 void __exit nvmet_exit_configfs(void); 559 560 int __init nvmet_init_discovery(void); 561 void nvmet_exit_discovery(void); 562 563 extern struct nvmet_subsys *nvmet_disc_subsys; 564 extern struct rw_semaphore nvmet_config_sem; 565 566 extern u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1]; 567 extern u64 nvmet_ana_chgcnt; 568 extern struct rw_semaphore nvmet_ana_sem; 569 570 bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn); 571 572 int nvmet_bdev_ns_enable(struct nvmet_ns *ns); 573 int nvmet_file_ns_enable(struct nvmet_ns *ns); 574 void nvmet_bdev_ns_disable(struct nvmet_ns *ns); 575 void nvmet_file_ns_disable(struct nvmet_ns *ns); 576 u16 nvmet_bdev_flush(struct nvmet_req *req); 577 u16 nvmet_file_flush(struct nvmet_req *req); 578 void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid); 579 void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns); 580 void nvmet_file_ns_revalidate(struct nvmet_ns *ns); 581 bool nvmet_ns_revalidate(struct nvmet_ns *ns); 582 u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts); 583 584 bool nvmet_bdev_zns_enable(struct nvmet_ns *ns); 585 void nvmet_execute_identify_ctrl_zns(struct nvmet_req *req); 586 void nvmet_execute_identify_ns_zns(struct nvmet_req *req); 587 void nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req *req); 588 void nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req *req); 589 void nvmet_bdev_execute_zone_append(struct nvmet_req *req); 590 591 static inline u32 nvmet_rw_data_len(struct nvmet_req *req) 592 { 593 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) << 594 req->ns->blksize_shift; 595 } 596 597 static inline u32 nvmet_rw_metadata_len(struct nvmet_req *req) 598 { 599 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) 600 return 0; 601 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) * 602 req->ns->metadata_size; 603 } 604 605 static inline u32 nvmet_dsm_len(struct nvmet_req *req) 606 { 607 return (le32_to_cpu(req->cmd->dsm.nr) + 1) * 608 sizeof(struct nvme_dsm_range); 609 } 610 611 static inline struct nvmet_subsys *nvmet_req_subsys(struct nvmet_req *req) 612 { 613 return req->sq->ctrl->subsys; 614 } 615 616 static inline bool nvmet_is_disc_subsys(struct nvmet_subsys *subsys) 617 { 618 return subsys->type != NVME_NQN_NVME; 619 } 620 621 #ifdef CONFIG_NVME_TARGET_PASSTHRU 622 void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys); 623 int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys); 624 void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys); 625 u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req); 626 u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req); 627 static inline bool nvmet_is_passthru_subsys(struct nvmet_subsys *subsys) 628 { 629 return subsys->passthru_ctrl; 630 } 631 #else /* CONFIG_NVME_TARGET_PASSTHRU */ 632 static inline void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys) 633 { 634 } 635 static inline void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys) 636 { 637 } 638 static inline u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req) 639 { 640 return 0; 641 } 642 static inline u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req) 643 { 644 return 0; 645 } 646 static inline bool nvmet_is_passthru_subsys(struct nvmet_subsys *subsys) 647 { 648 return NULL; 649 } 650 #endif /* CONFIG_NVME_TARGET_PASSTHRU */ 651 652 static inline bool nvmet_is_passthru_req(struct nvmet_req *req) 653 { 654 return nvmet_is_passthru_subsys(nvmet_req_subsys(req)); 655 } 656 657 void nvmet_passthrough_override_cap(struct nvmet_ctrl *ctrl); 658 659 u16 errno_to_nvme_status(struct nvmet_req *req, int errno); 660 u16 nvmet_report_invalid_opcode(struct nvmet_req *req); 661 662 /* Convert a 32-bit number to a 16-bit 0's based number */ 663 static inline __le16 to0based(u32 a) 664 { 665 return cpu_to_le16(max(1U, min(1U << 16, a)) - 1); 666 } 667 668 static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns) 669 { 670 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) 671 return false; 672 return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple); 673 } 674 675 static inline __le64 nvmet_sect_to_lba(struct nvmet_ns *ns, sector_t sect) 676 { 677 return cpu_to_le64(sect >> (ns->blksize_shift - SECTOR_SHIFT)); 678 } 679 680 static inline sector_t nvmet_lba_to_sect(struct nvmet_ns *ns, __le64 lba) 681 { 682 return le64_to_cpu(lba) << (ns->blksize_shift - SECTOR_SHIFT); 683 } 684 685 static inline bool nvmet_use_inline_bvec(struct nvmet_req *req) 686 { 687 return req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN && 688 req->sg_cnt <= NVMET_MAX_INLINE_BIOVEC; 689 } 690 691 static inline void nvmet_req_bio_put(struct nvmet_req *req, struct bio *bio) 692 { 693 if (bio != &req->b.inline_bio) 694 bio_put(bio); 695 } 696 697 #ifdef CONFIG_NVME_TARGET_AUTH 698 void nvmet_execute_auth_send(struct nvmet_req *req); 699 void nvmet_execute_auth_receive(struct nvmet_req *req); 700 int nvmet_auth_set_key(struct nvmet_host *host, const char *secret, 701 bool set_ctrl); 702 int nvmet_auth_set_host_hash(struct nvmet_host *host, const char *hash); 703 int nvmet_setup_auth(struct nvmet_ctrl *ctrl); 704 void nvmet_auth_sq_init(struct nvmet_sq *sq); 705 void nvmet_destroy_auth(struct nvmet_ctrl *ctrl); 706 void nvmet_auth_sq_free(struct nvmet_sq *sq); 707 int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id); 708 bool nvmet_check_auth_status(struct nvmet_req *req); 709 int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response, 710 unsigned int hash_len); 711 int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response, 712 unsigned int hash_len); 713 static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) 714 { 715 return ctrl->host_key != NULL; 716 } 717 int nvmet_auth_ctrl_exponential(struct nvmet_req *req, 718 u8 *buf, int buf_size); 719 int nvmet_auth_ctrl_sesskey(struct nvmet_req *req, 720 u8 *buf, int buf_size); 721 #else 722 static inline int nvmet_setup_auth(struct nvmet_ctrl *ctrl) 723 { 724 return 0; 725 } 726 static inline void nvmet_auth_sq_init(struct nvmet_sq *sq) 727 { 728 } 729 static inline void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) {}; 730 static inline void nvmet_auth_sq_free(struct nvmet_sq *sq) {}; 731 static inline bool nvmet_check_auth_status(struct nvmet_req *req) 732 { 733 return true; 734 } 735 static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) 736 { 737 return false; 738 } 739 static inline const char *nvmet_dhchap_dhgroup_name(u8 dhgid) { return NULL; } 740 #endif 741 742 #endif /* _NVMET_H */ 743